But to bring it around to games, I'd love if most purchased games had the option for private servers... with a couple fears that may not apply to all games and genres...
#1. A verification portal/lobby that could easily be disabled by the developer if/when support for the game is discontinued
#2. Hacking concerns. If you're playing with your buddies, you're probably modifying the game the way you want to play it. If its a game where strangers are playing, modifications become a concern, especially if the only options are private servers that might not disclose the ways the game has been modified to benefit the host.
#3. Additional development costs for private server support might be higher than the estimated costs for public server support over the projected lifespan of the game.
#4. I believe #s costs, and losses due to potential piracy, would likely be outweighed by a delayed rollout of public server support. Most game sales are in the first month, now, anyways... so planning on a feature like this after 1-6 months could be used as a way to retain and energize 'hardcore' players, and attract additional purchase from their friends, or people who had a 'wait and see' approach